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//Eg-6.13
//pg-302
clear
clc
//zc-confidence level
A=[3 99.73;2.33 98;1.96 95;1.65 90;1.28 80;1 68.27];
//mean and standard deviation
x=24.8;
s=1.35;
n=60;//two months
//90% confidence level
zc=1.65;
limit1=x-zc*s/n^.5;
limit2=x+zc*s/n^.5;
//95% confidence level
zc=2.33;
lim1=x-zc*s/n^.5;
lim2=x+zc*s/n^.5;
disp("90% confidencelevel limits")
disp(limit1)
disp(limit2)
disp("95% confidencelevel limits")
disp(lim1)
disp(lim2)
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